The AP fact checked Trump's Joe Scarborough tweet

Scarborough and his co-host, Mika Brzezinski, often speculate about and deride the president's mental health while pointing to controversial tweets of his and the rising tensions between the USA and North Korea. "He is, by any honest layman's definition, mentally unwell and viciously lashing out".

Besides the conspiracy theory about Scarborough, Trump has spouted other unproven claims including that former President Barack Obama has a fake US birth certificate and that the Access Hollywood tapes in which he said "grab them by the pussy" about women are not real.

"I would like the cabinet members serving America, not the president ... you serve America and you know it".

"Looks like I picked a good day to stop responding to Trump's freaky tweets", Scarborough wrote to his 1.96 million followers. And yet, he's completely detached from reality. We had a New York Times and Washington Post piece saying so a couple of days ago. You know you don't serve Donald J. Trump, scam developer, scam, you know, Trump University proprietor.

The TV presenter spoke about the use of the 25th amendment, which is in place to remove a president should they be deemed to be unfit to continue in the role. Scarborough resigned months later, just five months into his fourth term, with Scarborough saying he wanted to spend more time with his children. "You don't represent him", Scarborough said.

"Today the president crossed another deeply disturbing line", Brzezinski's statement said. You represent 320 million people, whose lives are literally in your hands. "This is all we're going to say on the matter". You serve America and you know it.

MSNBC talk show star Joe Scarborough claimed on Thursday that he was told by sources close to US President Donald Trump during his campaign that the candidate was suffering from the "early stages of dementia". "Is that when it's proper to bring this up in polite society?"

After news broke of NBC's firing of Matt Lauer due to sexual harassment allegations, Trump vaguely accused NBC chairman Andy Lack of wrongdoing. Is it after the first nuclear missiles fly?